First, an essay on why this isn't such a big concern, and you really ought to go get some exercise.
Second, the BBC's Mark Urban, of Newsnight, as quoted in the July 25, 2005 issue of The New Yorker:
"The I.R.A. had a political arm, and a political goal, however unreal: they killed to get people to the table. What is there to negotiate with these people? An end to the American presence in Saudi Arabia? All right, we'll consider it. The elimination of the State of Israel? Hmmm, that may be a bit more difficult. The restoration of a universal Islamic calpihate? It may be a bit of a deal-breaker, that. This is not a program, really. It's a wraparound justification for a violence whose real end is the expiation of shame through massacre."